Paper-bag machine



PAPER BAG MACHIN L Mm m Y T Q C C Filed June 28,

Dec. 31., 1929f A. c. Cow ET AL 4 1,742,174v

PAPER BAG mcnum Filed June 28, 1924 17 Sheets-Sheet 2 INVE TO Dec. 3l, 1929. A. c. coTY ET AL PAPER BAG MACHINE Filed June 28, 1924 17 Sheets-Sheet 3 Dec. 31, 1929. I A. c. con ET AL 1,742,174

PAPER BAG MACHINE Filed June 28, 1924 17 ShetS-Sheeb 4 lv ENTOR I 'met Dec. 31, 1929. A. c. con( ET'AL 1,742,174

PAPER `BAG MACHINE med June 28, 1924 1v sheets-sheet 5 INVENTOR .,/l l

Dec. 31, 1929. A. c. cowA ET A1. I 1,742,174

PAPER BAG MACHINE Filed June 281924 17 sheets-sheet 6 lNVENTOR DQC? 31 l929 A. c. coTY ET Ax. 1,742,174

PAPER BAG MACHINE y Filed June 28, 1924 Y 17 Sheets-Sheet 7 I l mVENToR l Dec. 31, 1929. A. c. coTY ET AL.

' PAPER BAG MACHINE Filed June 28, 1924 1f? Sheets-Sheet 8 INVENTOR Dec. 31, 1929. A. c. co'rY Er A1. 1,742,174

PAPER BAG MACHINE Filed June 28, 1924 17 sheets-sheet 9 Dec. 3l, 1929'. A. c, coTY ET AL l PAPER BAG MACHINE 17 Sheets-Sheet 10 Filed VJune 28, 1924 Hmmm 'mmm'.

INVENTOR "l 1 l l) r4 Dec. 31, 1929. A. c'. cow ET A1. v

PAPER BAG MACHINE Filed June 28, 1924 17 Sheets-Sheet 11 1'7 Sheets-Sheet 12 INVE T0 E f /V Z1 Dec.'3l, 1929. A. c. coTY ET AL PAPER BAG MACHINE 17 Sheets-Sheet 125 Filed June 28, 1924 INVENTOR Ill/'1 lIl l' 6|.

Dect. 3l, 1929'. A. c. coTY ET AL 1,742,174

- PAPER BAG MACHINE Filed June 28, 1924 17 shets-sheet 14 ATTORNEY.

Dec. 31, 1929. A. c. co'll'Y ET AL PAPER BAG MACHINE Filed June 28,' 1924 7 17 Sheets-Sheet 15 De@ 31, 1929 Ayc. CoTY ET Al.

PAPER BAG MACHINE Filed June 28, 1924 I 17 sneetssheet 16 l V TOR 'l' PAPER BAG MACHINE 17 Sheets-Sheet 17 Filed June 28, 1924 in Letters-Patent toA. C. Coty,

Patented Dec. 31, 1929 UNITED STATES PATENT OFFICE ALFRED C. COTYAND THCMAS EARL COTY, 0F CARTHAGE, NEW YORK PAPER-BAG MACHINE Application led .Tune 28,

space, and to eliminating factors retarding' speed of operation which are present in former machines known to us. In general the machine is of the class shown, for example, No. 1,119,244, granted December 1, 1914; but our improvements n'lay be used in machines of a different t pe.

yAfter the web is formed into a tube by overlapping its edges as is common in bag-ma! chmes, a tongue is out in the solid side of the l tube by a knife of well known shape (such for example as is shown in Letters-Patent to A. C. Coty, N o. 1,450,864, dated May 1, 1922),

which leaves a thumb-notch in the top of the preceding bag when the latter is severed lfrom the web at the root of the tongue by the cut-off knife, which is arranged to act there. In some prior machines the thumb-knife cuts into a rubber roll, or into a slot in a roll of some other material. As the radius of the sweep of the knife is altered to make a change in the size of the bags manufactured, severalv sizes of change-gears are required; as the .30 gears wear, lost motion makes the relation of the knife to the slot unreliable, so that the knife may strike the roll and he ruined. Our improved drilv'e for this knife (Figures 3,' 10 and 11) uses'spur-gears which it is not necessary to change when the knife radius is altered. Two of these gears drive the knife and slotroll, respectively;-and these areconnected yby transmitting gearscarried at the endsof radius links centered on the knife and slotroll shafts. Right and left screws adj ust the distance apart of the first-named spur gears, the links moving the transmitting gears in or out. Bevel-gears drive the mechanism, and one of them is arranged to be moved along its shaft, so that whenthe knife is shifted, this gear may he brought into meshand secured. Thus no change-gears are required for the thumb-knife, and bag-sizes may be changed quickly and conveniently.

off particles of paste,

IVe have also devised an improved cut-off" 1924. serial No. 723,031.

knife, operating without cams. In prior machines in which the knife has radial movement in its own'plane, the wear upon the high point of the cam operating the knife is con-y siderable (the rise being abrupt to make the knife enter and leave the slot quickly) also more power is required and the action is inevitably noisy. In our machine we use no cam or relative movementof the knife and its carrier. The rapid and accurate out required for speed of operation is effected by making one of the rolls (we have shown it as the slot :roll in Figures 12 and 13) a sub-multiple in diameter of the other; that is, the slot-roll is onehalf or onethird the diameter of the kniferoll, as here shown. The divergence of the two circumferences is thus much sharper, and there is more room for the entrance and withdrawal of the cut-off knife. This speeds up the machine, and saves power and noise.

Another improvement is in the folding devices for the bag-bottom. In former machines an efficient and useful rotary-folder has been used; but it has been necessary to rotate it at high speed, since the space in which it must about two inches of the bag movement. The paste having been applied to the fold and the act to complete the fold is only radius of gyration being short, snapping it Y over in this way at high speed is apt to` whip making the bags stick together. In our improved machine, for effecting this final pressing down of the second fold (see Figures 8 and 9) we employ an arm having rotatory reciprocation, as more fully explained later, carrying a presser-plate which by means of the'arm accompanies the bag for about sixteen inches of its travel; the circumferential speed of the endof the flap therefore need be only moderate, and the paste is not spattered at all.

Another-feature 4is a cam-operated finger l upon the creaser slot-roll (Figures 7 8 andi9) timed to engage and press down the first fold of the bag-bottom until it is yreleased atl thetime the swinging arm just referred to begins to turn over the second or final fold, as best seenin Figure 8. l

In former machines in whichthe tube is opened by pins to form the bottom after cuts time the first creaser engages the tube until lthe bag is completed at least one of the meehanisms is acting upon the web at all times,

there being an overlap so that at the time when the partly formed bag passes from one to the other, two of them act simultaneously and the bag is not released from one control until another engages it. This continuous positive engagement of the bag is of great utility and diminishes waste in operation.

The machines are large and take considerable floor-space. This we diminish by arranging the frame as a saw-tooth structure, which shortens them materially and brings the web better into view for inspection.

The accompanying drawings show one embodiment of our invention. Other embodiments not differing in principle are intended to be covered by our claims.

In the drawings Figures 1 and 1a taken together are a side elevation of the complete machine. Figure 2 is a side elevation'upon a larger scale of the paper reel and its controlling device. Figure 3 is a side elevation of the gearing of the y thumb-knife. Figure 4 is a detail of the lateral shifting means for the tube-former. Figure 5 is a detail of the cut-off knife. Figure 6 shows certain operating gears and the hand-wheel used in threading through the web at starting. Figure 6a is a detail of the means for separating the corrugating rolls of Figure 6. Figure 7 shows the improved bag-opening finger. Figure 8 shows our improved folding device for completing the bottom of the bag. Figure 8a is a detail, partly sectional. of the creasing mechanism shown on the right of Figure 8. Figure 9 shows the delivery mechanism for the completed bags. Figures 10 and 11 are side and end elevations partly in section of the thumbknife gears, shown also in Figure 3.- Figures 12 and 13 are side and end elevations of our improved cut-off knife. Figures 14 and 15 are side elevations ofthe means for opening the bag to form the bottom folds; Figure 16 is an end elevation of a portion of the bottom forming roll; Figure 17 is a detail end elevation of the cams used with the creaser slot-roll. Figure l17a is a side elevation of the same parts. Figure 18 is a diagrammatic sketch showing the steps of the passage of the web through the machine.

Describing the machine Igenerally from Figures 1, 1, and 18, the paper B1 passes from right to left beginning at the reel B,- thence around the first guide roll B9, thence through the tongue-cutter C, around another guide roll B9, down to still another roll B ypleted. Thenee the bags pass Working in conjunction with the seamfpasting disc D revolving in the paste-pot D1. Thence the web passes up to the tube-former E, which may he of the type shown in the patent to Coty No. 1,119,244, or of some other form. The central part of the web passes above the tube-former, the lower lines representing its edges. Thence the web passes between the draw-rolls F5 F6 F7 (at the top of Figure la), thence through the eut-off knife, thence through the slitting mechanism shown at the right of Figure 1; thence by the rolls 17-18 and belt F around roll H to the opening finger H; thence through the creasing device and bottom-folding mechanism on the left in Figure 1, where the bottom 1s combetween delivery rolls which press the folds flat and eject the bags into the box M. This general course of the paper is the same as with other bag-machines, though the instrumentalities which operate upon it are different.

Referring to the more detailed drawings, in Figures 1, 1EL and 2, A is the frame of the machine, usually of cast iron, flanged for stiffness. B is the roll of paper from which the web marked B1 is drawn. The roll is carried on a shaft with bearings which permit its easy replacement. B2 is the shifter` head, which also acts as a brake. 3 is a plate Carrying a roller B5 bearing against the end of the roll of paper, the plate being secured to the head B2 by the thumb-screw B4. An arm B, usually a piece of shafting, projects from a-hub B7 mounted upon a screwshaft carried on the frame of the machine; the hand-wheel B8 rotates the shaft, which is threaded into the hub B7, shifting the hub and brake sidewisel to adjust the position of the roll B. Similar devices are in use in the art. The web B1 passes aroundthe guide` rolls B to the parts shown in Figures 3, 10 and 11.

In Figure 3, which should be read in connection with Figures 10 and 11, is shown the4 arrangement of gears for the thumb-knife. This knife in our machine is mounted on radial arms projecting from the shafts C15,

C1, and is substantially like that shown in the Letters-Patent to A.. C. Coty No. 1,453,- 864, dated May 1, 1923; but the gearing differs in important ways. In our present machine it is unnecessary to change the gears in order to make thumb-notches in bags of different lengths, which has been an objectionable feature-in machines known to us. The device as -a whole bears the reference letter C, C1, C1 arebevel gears '(see Figures 10 and 11, top) by which when one is rotated by a wrench the screw-shaft C2 is re- `volved; this shaft bears right and left threads,and separates/or approximates the .bearings of the shafts C, C, carrying the spur gears C3, C4. These do not mesh. hut are engaged respectively with they gears C, C.

Links C?, C8, are centered upon the shafts C15, C13, and the stud-shafts of gears C3',C

maintaining these gears in mesh with gears C, C4, and with each other. The shafts of gears C3, CG, are carried by a sliding plate C", held in ways secured to the frame of the machine by bolts C13. The gear 4,C5 is driven bythe bevel gears C12, C12, one of which is attached to gear C5 and the other is carried on and driven by the shaft C11 rotating in the sliding bearing C13, secured..` to the'plate C1T by bolts C13, and driving the gear C12 by the square stud C2 aiined thereto or formed integral therewith. Bolts C14 are adjustedto make the bearing C13 lit shaft C11 snugly and prevent lost motion. y

The operation of this part ofthe machine is as follows )Vhen thebevel-gears C1 at the top Iof the ligure are rotated the screw C is revolved and separates or approximates the gears C3, C4; the links CT, C3 drawin or pushout the gears C3, C and the sliding plate C17. The nuts C14 being loosened, the gear C12-is brought into mesh with its mate attached to gear G3; rotation of the shaft C11 turns gears C1?, thus turning C3, which rotates both C* and C6, the latter' in turn revolving gear C3. We have omitted any representation of the thumbknife and its slot member, for clearness of illustration; they are sufficiently described in the. Coty patentreferred to above.

From the thumb-knife C, Figures la and 3,

-the web passes down over the guide roll B3 -at the left of Figure 3, then down aroundV the similar roll at the bottom of that Figure,-

where the seam has paste appliedto one side of the web by the disc D, revolving in the paste contained in the tank D1. Thence it passes toithe parts shown in Figure 4.

Figure l shows the tube-former E. In ,general this resembles those shown in the Coty patents already named, and consists of a plate, usually with some form of adjustnient in width, over which the web B1 passes and over which itis bent down at the sides, as indicated at B1ZL and B111, which indicate the side-edges of the web. The plate is carried on a bracket which may be moved laterally f, bv a screw the squared head `of which is marked E2, the base E1 of the bracket moving in ways upon a base-plate E5, the ways secured by bolts 151,124. A locking screw E3 secured the bracket in its adjusted position. This part of the machine isold. Draw rollers E3, usually of rubber and conical in form (see Figures l and 5)', yfor drawing over the edges of the web to form the lap-seam are also provided. i

In Figure 5, which should be read in connection with Figures 12 and 13the folded web is shown drawn forward by the feedrolls F3, F11, F7. The latter' two rolls have spring boxes and act by pressure; while F5 1s driven by `a gear from the roll F3 carrying -by the screws N t.

y and lever F13.

the cut-olf knife N, change-gear FA1 is carried' on a link F 311 -centered on the shaft of roll F5, and slotted on its outer end at^F21, being also provided with a bolt F22 to secure the arm in place. By changing gear F4 and adjusting the position of the link F31 bags of different lengths are provided for. The knife-roll is also provided `with bevelgears F9 for driving the shaft C11 by means of which the thumbknife C is operated, the arrangement thus 'fixying the necessary definite relation between the cuts of the two knives. rIfhe roll F3 is driven from 'ear F2. On the'shaft of this gear is a cam '433 which by means of a cam-roller /133 reciprocates the rod F (see-also Figures 6 and 6a) by' which the"crimper is operated, as described later.

The cut-oli;l knife N (see Figures 12 and 13) is carried in a bar N1, and is secured in place.

by the screws Az--n, the bar being held in place The carrier F3, which for brevity we have called a roll, is composed of the discs F3, (see Figure 18) notched to receive the bar N1. The knife N strikes in a slot N3 in a bar N2 secured i'n the roll Fsby screwsiN. In practice the adjustment of the bars and the duration and timing of the actions are such that the bag and the web B1 are not released from control when the bag is `severed from the web, as mentioned in our opening statement. As there referred to, the diameter of the slot-rollF3 is a sub-multiple of thatof the roll F3, the relation here illustrated being one-half; this may be one-third or one-quarter. The divergence of the circumferences is thus made sharper, and the entrance and exit of the blade into and out of the slot N3 is facilitated, permitting higher speed.

The `brackets E7, a part only of the lower .one being shown in Figure 5, support the tuber E and are secured to the frame of the machine.

Figures 6 and 61 show the inching wheel F, by which the machine may be operated by hand when Aoccasion arises,l (as in vthreading through the web at starting or after interruption), aswell as other parts. To the shaft of this wheel, which is the power-shaft of the machine, the driving motor (not shown) is usuallyv attached or geared in sonic suitable way. The shaft carries a gear F1, driving the gear F3, shown also in Figure As best seen in Figure 6, in connection with Figures 5 and 6, F2 carries a cam F13 operating a link or pitman' F15 by I.means of the cam-roller 7633; the link reciprocates a lever F13, pivoted at f1 and controls the lapproach of a roll F13 to another roll F13, the web B1 passing between them. As the cam F33 rotates, its high point moves roller ,7133 away from the center, pulling upon the link F13 pressing together the rolls F13, F14. These are corrugated, and the timing is such thatthey press upon the upper 

